Comment 12 for bug 1455644

Till, this looks great, confirmed that the -N variant listens on loopback for both ipv4 and ipv6. Very nice, thanks.

I am concerned to see a timeout on the select() statement; select_tut(2) strongly recommends writing code in a way that does not use the timeout:

       1. You should always try to use select() without a timeout.
           Your program should have nothing to do if there is no
           data available. Code that depends on timeouts is not
           usually portable and is difficult to debug.

Thanks